Year	constant 2011 international $
1990	7984.40021984896
1991	6255.53043851688
1992	3420.20457244877
1993	2399.57142363299
1994	2183.37021398829
1995	2325.91734972461
1996	2682.01988831753
1997	3060.75928185705
1998	3234.84821822438
1999	3396.8360351214
2000	3527.21002564036
2001	3754.50025704068
2002	3995.70676567452
2003	4467.65225194067
2004	4755.8906418095
2005	5245.1768661547
2006	5771.98024917422
2007	6532.02026961474
2008	6710.35639053596
2009	6523.07432830012
2010	6981.47589791816
2011	7545.93946556889
2012	8084.49566749305
2013	8383.49305501964
2014	8766.99593876866
2015	9005.33867753628
2016	9256.1465770659
2017	9702.16827734726
2018	10151.6973976951